Or gasket 03181 silicone red

Is your La Cimbali machine leaking water or losing steam at a joint? O-Ring 03181 (part no. 1786413), made from red silicone, is the sealing element that wears out, hardens, or deforms over time, losing its ability to seal. This is the correct replacement part to restore a leak-free joint without replacing the entire assembly.

Important — verify your model: before ordering, confirm the exact designation and version of your La Cimbali machine and the specific location of this O-ring within the machine. You will find the details on the rating plate (typically on the underside or rear of the machine). Cross-check the O-ring by its dimensions (inner diameter and cross-section thickness) and its position in the circuit to ensure the part fits the groove correctly.

When does this part need replacing? (Fault symptoms)

This part typically fails when you notice one or more of the following symptoms:

• Water leaking from beneath the machine or pooling under it despite an empty drip tray
• Steam escaping from the steam wand or a joint even when the valve is closed
• Hissing sounds during operation caused by pressure loss in the circuit
• Water seeping around the joint where the O-ring is seated, or dripping in an unexpected location

Compatibility: Which models does this part fit?

This O-ring is intended for professional La Cimbali espresso machines. No definitive model compatibility list was supplied for this part; when selecting, cross-reference by part position and dimensions against the original O-ring in your machine.

La Cimbali

• Original part designation: O-Ring 03181 (part no. 1786413)
• Material: red silicone
• Verify compatibility by matching the original part in your machine (dimensions and position in the circuit) or contact our technical support team for assistance

Genuine vs. compatible part

Brewive supplies this O-Ring 03181 as a genuine La Cimbali replacement part (part no. 1786413). A genuine part guarantees the correct dimensions, material, and groove fit — which is critical for sealing components: a difference of just one millimetre means the seal will either not seat properly or will not seal at all.

Delivery and returns

The part is in stock and dispatched within 24 hours from the EU; expert technical support from our service technicians is available. An unused and uninstalled part may be returned within 14 days under the statutory right of withdrawal.